OK, let's crack this. We're given 946 and our task is to multiply it by 89. Essentially, we'll be adding 946 to itself 89 times.
Step 1: 0 + 946 = 946
Step 2: 946 + 946 = 1892
Step 3: 1892 + 946 = 2838
Step 4: 2838 + 946 = 3784
Step 5: 3784 + 946 = 4730
Step 6: 4730 + 946 = 5676
Step 7: 5676 + 946 = 6622
Step 8: 6622 + 946 = 7568
Step 9: 7568 + 946 = 8514
Step 10: 8514 + 946 = 9460
Step 11: 9460 + 946 = 10406
Step 12: 10406 + 946 = 11352
Step 13: 11352 + 946 = 12298
Step 14: 12298 + 946 = 13244
Step 15: 13244 + 946 = 14190
Step 16: 14190 + 946 = 15136
Step 17: 15136 + 946 = 16082
Step 18: 16082 + 946 = 17028
Step 19: 17028 + 946 = 17974
Step 20: 17974 + 946 = 18920
Step 21: 18920 + 946 = 19866
Step 22: 19866 + 946 = 20812
Step 23: 20812 + 946 = 21758
Step 24: 21758 + 946 = 22704
Step 25: 22704 + 946 = 23650
Step 26: 23650 + 946 = 24596
Step 27: 24596 + 946 = 25542
Step 28: 25542 + 946 = 26488
Step 29: 26488 + 946 = 27434
Step 30: 27434 + 946 = 28380
Step 31: 28380 + 946 = 29326
Step 32: 29326 + 946 = 30272
Step 33: 30272 + 946 = 31218
Step 34: 31218 + 946 = 32164
Step 35: 32164 + 946 = 33110
Step 36: 33110 + 946 = 34056
Step 37: 34056 + 946 = 35002
Step 38: 35002 + 946 = 35948
Step 39: 35948 + 946 = 36894
Step 40: 36894 + 946 = 37840
Step 41: 37840 + 946 = 38786
Step 42: 38786 + 946 = 39732
Step 43: 39732 + 946 = 40678
Step 44: 40678 + 946 = 41624
Step 45: 41624 + 946 = 42570
Step 46: 42570 + 946 = 43516
Step 47: 43516 + 946 = 44462
Step 48: 44462 + 946 = 45408
Step 49: 45408 + 946 = 46354
Step 50: 46354 + 946 = 47300
Step 51: 47300 + 946 = 48246
Step 52: 48246 + 946 = 49192
Step 53: 49192 + 946 = 50138
Step 54: 50138 + 946 = 51084
Step 55: 51084 + 946 = 52030
Step 56: 52030 + 946 = 52976
Step 57: 52976 + 946 = 53922
Step 58: 53922 + 946 = 54868
Step 59: 54868 + 946 = 55814
Step 60: 55814 + 946 = 56760
Step 61: 56760 + 946 = 57706
Step 62: 57706 + 946 = 58652
Step 63: 58652 + 946 = 59598
Step 64: 59598 + 946 = 60544
Step 65: 60544 + 946 = 61490
Step 66: 61490 + 946 = 62436
Step 67: 62436 + 946 = 63382
Step 68: 63382 + 946 = 64328
Step 69: 64328 + 946 = 65274
Step 70: 65274 + 946 = 66220
Step 71: 66220 + 946 = 67166
Step 72: 67166 + 946 = 68112
Step 73: 68112 + 946 = 69058
Step 74: 69058 + 946 = 70004
Step 75: 70004 + 946 = 70950
Step 76: 70950 + 946 = 71896
Step 77: 71896 + 946 = 72842
Step 78: 72842 + 946 = 73788
Step 79: 73788 + 946 = 74734
Step 80: 74734 + 946 = 75680
Step 81: 75680 + 946 = 76626
Step 82: 76626 + 946 = 77572
Step 83: 77572 + 946 = 78518
Step 84: 78518 + 946 = 79464
Step 85: 79464 + 946 = 80410
Step 86: 80410 + 946 = 81356
Step 87: 81356 + 946 = 82302
Step 88: 82302 + 946 = 83248
Step 89: 83248 + 946 = 84194

So, 946*89 = 84194